Pulse Amplitude Modulation

Presented by :

Rajesh Panigrahi

1. Baseband signal 2. Sampled signal

Detection Of Natural PAM

• PAM Signal Demodulated PAM Signal

Low pass filter

Detection of Natural PAM

• The PAM signal can be detected(demodulated) by passingthrough a low pass filter.• The Low pass Filter Cut Off Frequency IS Adjusted to Fm sothat all the

frequency ripple is moved and the original• modulating signal is recovered back.

Flat Top PAM

Flat Top PAM

Advantages…Better SNR Due To Incresed Signal Power.Generation Is Easy

Disadvantages…Aperture Effect Reduce Distortion

Flat Top Sampling